Starting in the early 1980s with simple chips with 4K of RAM, Dinan has grown with the industry and used their experience as an early adopter to remain at the forefront of ECU tuning. Three decades of ECU tuning has pushed Dinan to greater and greater heights, now offering integrated hardware/software solutions for today's complicated engine management systems. Dinan's performance software will not only improve horsepower and torque, but also offer improved drivability and even increased fuel economy in many cases.

341 HP and 335 lb/ft of torque
Won't void or negate your warranty
Emissions legal in all 50 states
Plug & play installation in two hours or less
Worth 2 points towards your Dinan badge

For over 35 years, Dinan has been America's premier tuning company, pioneering advancements in BMW modification while retaining a focus on balanced performance that preserves the original character and driving feel that a BMW offers. When you install a Dinan part on your car, know that it's not only carefully developed and tested, but that Dinan stands behind it with a four year, 50,000-mile warranty. Dinan believes so fully in their “total package” approach that once your car has been fitted with enough of their parts, they celebrate your conversion from stock to Dinan with an exclusive trunk badge, displayed proudly by BMW enthusiasts everywhere.

Not for sale or use in the state of California on any pollution-controlled vehicle as per the California Air Resources Board.

DINANTRONICS Stage 4 Performance Tuner